/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.kie.kogito.process.expr;

import java.util.Collection;
import java.util.Optional;
import java.util.ServiceLoader;
import java.util.stream.Collectors;

public class ExpressionHandlerFactory {

    private ExpressionHandlerFactory() {
    }

    private static final Collection<ExpressionHandler> expressionHandlers = ServiceLoader.load(ExpressionHandler.class).stream()
            .map(ServiceLoader.Provider::get).collect(Collectors.toUnmodifiableList());

    public static Expression get(String lang, String expr) {
        return getExpressionHandler(lang).orElseThrow(
                () -> new IllegalArgumentException("Unsupported language " + lang)).get(expr);
    }

    public static boolean isSupported(String lang) {
        return expressionHandlers.stream().map(ExpressionHandler::lang).anyMatch(lang::equals);
    }

    private static Optional<ExpressionHandler> getExpressionHandler(String lang) {
        return expressionHandlers.stream().filter(p -> p.lang().equals(lang)).findFirst();
    }
}
